Use Gerry Jackson 2012 test suite

[philburk]

Also move original tests out of main fth folder.

Download suite from: https://github.com/gerryjackson/forth2012-test-suite

Recommended by Stephen Pelc: https://forth-standard.org/proposals/let-us-adopt-the-gerry-jackson-test-suite-as-part-of-forth-200x#contribution-63

Also: http://soton.mpeforth.com/flag/anstests/index.html